Dust, a small solid particle, is a main member of the interstellar matter of our Galaxy.Carbonaceous dust is thought to be responsible for red photoluminescence, a set of infraredemission features, and an absorption feature at 217.5 nm, which are seen in our Galaxy. To comparewith astronomical observations and derive quantitative information, various types of carbonaceousdust analogs have been synthesized and studied in laboratories. We synthesize a laboratory dustanalog, which is named the quenched carbonaceous composite (QCC) via a cooling process of aplasmic gas. A type of QCC is a carbonaceous material composed of onion-like particles andanother type of QCC is an organic material containing polycyclic aromatic hydrocarbons (PAHs).Their ultraviolet to infrared spectra show similar features seen to those in celestial objects. In thispaper we review carbonaceous dust in our Galaxy based on both experimental and observationalstudies.
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